Rack divider



FIG. 1 is a top, front, and left side perspective view of a rack divider embodying my new design;

FIG. 2 is a front view thereof, the rear view is a mirror image of the front view;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof. 

CLAIM The ornamental design for a rack divider, as shown and described. 